Azoospermia can be caused by many factor. If you have Testicular failure then the treatment would be depending on the reason for the testicular failure.
One good site for urology information is from Dr. Paul Turek in San Franciscio.
This is from his website: http://www.theturekclinic.com/html/services_azoospermia.html#whatIs
TABLE 1. CONDITIONS THAT CAUSE AZOOSPERMIA
Primary testicular failure
Y chromosome microdeletions
Genetic infertility due to abnormal chromosomes (karyotype)
Unexplained genetic infertility
Secondary testicular failure
Unexplained gonadotropin deficiency
Cancer treatment (chemotherapy, radiation, surgery)
Drug induced (anabolic steroids, alcohol, glucocorticoids)
Congenital adrenal hyperplasia
Severe illness (cancer, kidney or liver failure)
Sickle cell anemia
Pesticide/toxin exposure (including hot tubs and baths)
Undescended testicles at birth
Congenital absence of the vas deferens (CAVD)
Ejaculatory duct obstruction
Scrotral trauma or surgery
So as you can see the list is long for just testicular failure and so I could not suggest any treatment unless we have the diagnosis.